WO2015055831A1 - Motopompe centrifuge pour circuit primaire de petits ou moyens réacteurs modulaires nucléaires - Google Patents
Motopompe centrifuge pour circuit primaire de petits ou moyens réacteurs modulaires nucléaires Download PDFInfo
- Publication number
- WO2015055831A1 WO2015055831A1 PCT/EP2014/072349 EP2014072349W WO2015055831A1 WO 2015055831 A1 WO2015055831 A1 WO 2015055831A1 EP 2014072349 W EP2014072349 W EP 2014072349W WO 2015055831 A1 WO2015055831 A1 WO 2015055831A1
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- WIPO (PCT)
- Prior art keywords
- motor pump
- shaft
- flywheel
- radial bearing
- impeller
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/08—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being radioactive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—Units comprising pumps and their driving means containing a coupling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/049—Roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C1/00—Reactor types
- G21C1/32—Integral reactors, i.e. reactors wherein parts functionally associated with the reactor but not essential to the reaction, e.g. heat exchangers, are disposed inside the enclosure with the core
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/24—Promoting flow of the coolant
- G21C15/243—Promoting flow of the coolant for liquids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Definitions
- the present invention relates to the field of primary motor pump units, which ensures the cooling of the nuclear reactor and the circulation of a heat transfer fluid in the primary circuit, and more particularly it relates to a primary motor pump architecture adapted to small and medium modular reactors.
- the small and medium-sized modular reactor sector commonly known as SMR for the acronym Small Modular Reactors
- SMR reactors are experiencing significant growth.
- Many SMR reactor designs are underway, typically in the 50 to 700 MW range ( ⁇ 300 MW for small reactors, ⁇ 700 MW for reactor facilities).
- SMR reactors are an appropriate response to the growing need for electrical energy, especially in developing countries.
- SMRs modular construction of the SMRs allows incremental increase of the production capacity, by having a number of modules adapted as needed. More compact, they can be partially prefabricated before transport and assembly on the final operating site. Designed as a plug-and-play solution, SMR reactor facilities are built faster, offering greater flexibility in terms of financing, scope of onsite installation work, sizing and end use.
- PWRs pressurized water reactors
- HTR high temperature reactors
- MSR molten salt reactors
- the ordinary water which constitutes the coolant is kept liquid under high pressure, of the order of 150 bar.
- the water recovers the heat produced by the nuclear fuel and transmits it to the secondary circuit fluid by means of steam generators.
- Vapor generators are located in the same enclosure as the reactor. The heat of the reactor is transmitted by the secondary circuit to a steam turbine which drives an alternator responsible for the production of electricity.
- One or more primary pumps ensure the circulation of water in the primary circuit, between the reactor core and the steam generators.
- the primary pump is an essential component for the operation and safety of a PWR plant.
- the design of SMR reactors require rethinking the architecture of the primary pump.
- the architecture of the integrated PWR which contains the reactor, the primary circuit and the steam generators in a module, imposes new constraints, both geometric and functional, and in terms of durability, or safety requirements. .
- a primary motor pump adapted to an SMR reactor has 60 years of durability, a fluid temperature at the inlet of a motor pump of between 300 and 350 ° C., an operating pressure of 140 to 160 bar, a coolant density between 600 and 700 kg / m 3 , as well as a set of geometric constraints (eg vertical or horizontal mounting, space envelope), assembly constraints (eg assembly by welding excluded, dismantling entirely feasible from the outside of the reactor, with no components remaining in the enclosure), and external constraints (eg seismic resistance).
- geometric constraints eg vertical or horizontal mounting, space envelope
- assembly constraints eg assembly by welding excluded, dismantling entirely feasible from the outside of the reactor, with no components remaining in the enclosure
- external constraints eg seismic resistance
- the invention relates to a centrifugal motor pump for the circulation of a heat transfer fluid in a nuclear reactor primary circuit.
- the motor pump comprises a sealed motor unit, a hydraulic part, and a shaft immersed in the heat transfer fluid, rotated by the sealed motor unit, and pumping the heat transfer fluid by means of an impeller of the hydraulic part, integral with the tree.
- the motor unit comprises a dry stator and a submerged rotor mounted integral with the shaft.
- the motor pump also comprises a flywheel immersed in the heat transfer fluid, mounted integral with the shaft, between the rotor of the power unit and the impeller of the hydraulic part, to ensure a minimum retardation time during a stopping rotation of the shaft by the motor unit.
- the flywheel comprises a paddle wheel generating a heat transfer fluid circulation for cooling the power unit.
- the motor pump comprises an external cooling circuit connected to the power unit, in which circulates the heat transfer fluid driven by the impeller.
- the heat transfer fluid is reintroduced after cooling by said circuit in the motor unit.
- the external cooling circuit comprises at least one coil wound on a body of the motor pump; the coolant circulating in the at least one coil being cooled by means of a secondary cooling fluid flowing around the body in a shell.
- the impeller consists of channels or grooves formed on a surface of the flywheel oriented toward the rotor.
- the motor pump comprises at least three radial bearings guiding the shaft in rotation.
- the rotor is disposed between a first radial bearing and a second radial bearing.
- the flywheel is disposed between the second radial bearing and a third radial bearing.
- the circulation of the heat transfer fluid generated by the impeller also makes it possible to lubricate the third radial bearing.
- the first radial bearing and the second radial bearing are hydrodynamic bearings such as plain bearings, pad bearings, and / or trilobed bearings, and the third radial bearing is a hydrostatic bearing.
- the motor pump also comprises an axial bearing disposed near the first radial bearing, able to block the axial displacement of the shaft.
- the axial bearing is a bearing with oscillating shoes.
- the motor pump comprises a thermal barrier between the power unit and the hydraulic part, to thermally isolate the motor group of the primary circuit.
- the shaft passes through the thermal barrier between the flywheel and the impeller.
- the flywheel is made of Inconel 625.
- the motor pump comprises an anti-unwinding device capable of mechanically preventing the rotation of the shaft in a predetermined direction.
- FIGS. 1a and 1b illustrate a primary motor pump according to the invention and its integration in vertical configuration in an SMR reactor
- FIGS. 2a, 2b and 2c show the primary motor pump according to a preferred embodiment of the present invention
- FIG. 3 describes a set of bearings implemented in the preferred embodiment of the invention
- FIGS. 4a and 4b describe an inertia flywheel provided with a paddle wheel implemented in the preferred embodiment of the invention
- FIGS. 5a and 5b describe an external cooling circuit implemented in the preferred embodiment of the invention
- FIGS 6a and 6b illustrate an anti-rollout device implemented in the preferred embodiment of the invention.
- FIG. 1a represents the upper part of a reactor 11 and a primary motor pump 10 according to the invention.
- the upper part of the reactor 11 comprises a pressurizer in which the coolant is maintained at high pressure and high temperature under the effect of the controlled nuclear reaction in a lower part of the reactor 11.
- the primary circuit of the reactor comprises one or more motor pumps which ensure the flow of fluid between the pressurizer and one or more steam generators.
- the upper part of the reactor 1 1 shown in Figures 1a and 1b comprises a domed portion and a substantially cylindrical base.
- Figure 1a shows the reactor 1 1 provided with a single primary motor pump 10 for better legibility of the scheme.
- the primary motor pump 10 comprises a motor unit 12 and a hydraulic part 13 separated by a thermal barrier 14.
- the base comprises a part of the primary circuit.
- the primary pumps are connected to a common collector 15 connected to the reactor core.
- the coolant is pumped to a common exhaust chamber 16 connected to the steam generators.
- the primary motor pump and its integration on the reactor illustrated by Figures 1a and 1b, are presented by way of example and do not constitute a limitation of the present invention.
- the motor pump is in vertical configuration
- the heat transfer fluid is ordinary water.
- the invention relates to a centrifugal motor pump for circulating a heat transfer fluid in a nuclear reactor primary circuit.
- Figures 2a, 2b and 2c show the primary motor pump according to a preferred embodiment of the present invention.
- the primary motor pump is a centrifugal motor pump which comprises a sealed motor unit 12, a hydraulic portion 13 separated by a thermal barrier 14. These three elements are traversed by a shaft 17 rotating about a longitudinal axis. The rotating assembly is immersed in the heat transfer fluid of the primary circuit.
- the motor unit 12 comprises a dry stator 18 and a submerged rotor 19 mounted integral with the shaft 17 which drives the shaft 17 and thus the moving parts of the hydraulic part 13 in rotation.
- the hydraulic part 13 comprises a suction duct 20, connected to the common manifold 15, and an exhaust duct 21 connected to the common exhaust chamber 16, separated by an impeller 22 integral with the shaft.
- the rotation of the impeller 22 driven by the shaft 17 allows the pumping of the coolant.
- the thermal barrier 14 comprises means for fixing the motor pump to the reactor. These fixing means are preferably of the bolt-nut type to allow easy disassembly of the motor pump.
- the thermal barrier 14 separates the motor pump between a cold part comprising the power unit 12 and a hot part comprising the hydraulic part 13 connected to the primary circuit. Typically, a temperature between 70 ° C and 160 ° C is sought in the cold part, while the hot part is close to the temperature of the heat transfer fluid, i.e. between 300 and 350 ° C.
- the primary motor pump according to the invention comprises a cooling circuit described in detail below.
- the cooling of the reactor is a decisive factor for the safety of the reactor.
- this need can be expressed quantitatively by the requirement to maintain a flow rate greater than or equal to 50% of the nominal flow rate 3 seconds after stopping the engine by power failure. It turns out that the inertia of the shaft and the rotor are insufficient to satisfy this type of requirement.
- the motor pump also comprises a submerged flywheel 23 mounted integral with the shaft 17, between the hot part and the cold part of the motor pump, or in other words between the rotor 19 of the motor unit 12 and the impeller 22 of the hydraulic part. 13.
- the flywheel maintains a sufficient heat transfer fluid flow for several seconds after a power failure or failure.
- the flywheel also smooths the rotational speed of the shaft 17, and limit the blows during startup or shutdown of the motor pump.
- the flywheel is also a radiological barrier to limit the radioactive emissions that can escape the reactor through the connection interface of the motor pump.
- the definition of the flywheel directly impacts the inertia of the shaft, the friction losses and therefore the power of the engine and the capacity of the cooling circuit.
- the flywheel is made of an alloy based on nickel and chromium, preferably the alloy known by its trademark Inconel 625.
- Figure 3 describes a set of bearings implemented in the preferred embodiment of the invention to ensure a reliable rotor dynamics.
- the moving assembly 25 is immersed in the coolant circulating in the motor pump.
- the motor pump comprises a set of bearings, lubricated by the pumped heat transfer fluid, ensuring the rotation of the moving assembly 25 with respect to the motor pump body 26.
- the set of bearings comprises :
- a second radial bearing 31 placed between the rotor and the flywheel, - A third radial bearing 32 disposed near the flywheel and the opposite side to the second bearing relative to the flywheel,
- the first and second radial bearings 30 and 31 provide a guide in rotation of the shaft 17 in a fixed part of the power unit 12. They provide the rotational guidance of the immersed rotor 19 relative to the dry stator 18. These bearings 30 and 31 are located in the cold part of the motor pump.
- the bearings 30 and 31 are plain bearings or pad bearings, and preferably pad bearings comprising five Ekasic trademark silicon carbide pads, and a stainless steel socket with tungsten carbide surface treatment.
- the third and fourth radial bearings 32 and 33 provide rotational guidance of the shaft 17 in a fixed portion of the thermal barrier 14. These bearings 32 and 33 are located in the hot part of the motor pump.
- the bearings 32 and 33 are of the hydrostatic and / or trilobal bearing type. They may be made of a stellite or Colmonoy® type alloy, or may comprise a surface hardening obtained by means of a surface treatment or by means of a coating.
- the bearing assembly of the motor pump also comprises an axial bearing 34 disposed near the first radial bearing 30 to block the axial displacement of the shaft.
- an axial bearing 34 disposed near the first radial bearing 30 to block the axial displacement of the shaft.
- the axial bearing 34 between the rotor and the upper end of the shaft.
- the axial bearing 34 consists of an oscillating pad bearing, and preferably an oscillating pad bearing comprising fifteen Ekasic G trademark silicon carbide pads, and a Ekasic C trademark silicon carbide disk.
- Figures 4a and 4b describe an inertia flywheel provided with a paddle wheel implemented in the preferred embodiment of the invention.
- the rotating assembly is immersed in the heat transfer fluid. It is therefore naturally heated to high temperature.
- the relatively high speeds of rotation of the shaft (typically between 2000 and 4000 revolutions per minute) generate a heating at the bearings and more generally at the rotating parts such as the steering wheel. of the inertia 23 and the submerged rotor 19.
- the flywheel 23 comprises a paddle wheel 40, which generates a circulation of heat transfer fluid for cooling the motor unit.
- the impeller 40 comprises a plurality of straight fins 41 provided on the upper surface of the flywheel 23; the upper surface of the flywheel being that oriented towards the rotor. It generates a flow of fluid symbolized by the arrows in Figure 4b.
- This circulation makes it possible, on the one hand, to feed an external cooling circuit 42 that we will describe later on, and on the other hand to generate a flow of fluid around the flywheel 23, from the cold part towards the part hot water pump.
- This flow of fluid allows in particular to lubricate the third radial bearing 32 disposed under the flywheel.
- the third bearing is a hydrostatic and / or trilobed bearing.
- a supply duct 44 is advantageously arranged in the thermal barrier 14 to ensure lubrication by the heat transfer fluid of the third radial bearing 32, by means of the fluid flow generated by the impeller 40.
- this circulation of heat transfer fluid generated by a paddle wheel arranged on the flywheel is particularly advantageous because it allows both the direct cooling of certain components, the lubrication of bearings, and the power supply. an external cooling circuit while limiting friction losses.
- This makes it possible to separate effectively at the level of the flywheel between a cold part, ie a temperature of the order of 80 ° C in the upper surface of the flywheel, and a hot part, ie a temperature of the order of 150 ° C on the lower surface of the flywheel.
- FIGS 5a and 5b describe an external cooling circuit implemented in the preferred embodiment of the invention.
- the external cooling circuit 42 in which circulates the coolant driven by the impeller 40 of the flywheel 23.
- the cooling circuit 42 comprises one or more coils 50, wound around the motor pump body 26.
- the heat transfer fluid which circulates in the at least one coil 50 is cooled by means of a secondary cooling fluid circulating around the body 26 in a cylindrical calender 51.
- the hydraulic circuit of the secondary cooling fluid, said secondary circuit, for pressurizing and cooling the secondary fluid, is not shown. Any conventional circuit is suitable for the present invention.
- the external cooling circuit 42 allows both the cooling of the coolant by heat exchange through the wall of the at least one coil 50, and the direct cooling of the motor pump by the wall of the motor pump body 26.
- the acceleration of the coolant transmitted by the impeller 40 makes it possible to feed the at least one coil 50, via the supply conduit 43 arranged in the body of the motor pump 26.
- the heat transfer fluid is cooled during transported in the coil, it is then reintroduced into the motor unit, near the upper end of the rotor.
- the fluid is reintroduced via a supply conduit 52 arranged in the motor pump body 26 facing the first radial bearing 30 and / or the axial bearing 34.
- the impeller 40 cooperating with the cooling circuit External cooling 42 thus generates a fluid loop to maintain the sealed unit in a temperature window compatible with its operation and its durability. This device is both simple and very effective; a cold part maintained in a temperature window of between 60 and 100 ° C. is produced.
- Figures 6a and 6b describe an immersed anti-wander device implemented in the preferred embodiment of the invention.
- the reliability of the pump is a fundamental element of the safety of the installation. It is necessary to ensure that the direction of pumping can not be reversed during a voluntary shutdown or not of the pump. In fact, when a motor pump is stopped and the others are still running, the discharge pressure thereof is higher than the suction pressure. A reverse flow passes through the motor pump and drives it into reverse rotation. The speed can be high and exceed the acceptable limit, both dynamically, hydraulically and mechanically.
- the motor pump according to the invention comprises a anti-roll device adapted to prevent the rotation of the shaft mechanically in a predetermined direction.
- Anti-turn device 60 immersed in the coolant, comprises a fixed portion 61 and a movable portion 81 integral with the shaft.
- the moving part is not shown in Figures 6a, 6b and 6c.
- it is the flywheel 23 previously described.
- the fixed part can be arranged on a surface of the thermal barrier 14 facing the flywheel 23. This embodiment is shown in Figure 5a.
- the movable portion 81 of the anti-outflow device 60 comprises at least one cavity 80 facing the fixed part 61, and at least one movable pin 62.
- the anti-outflow device 60 is configured so that, since the shaft 17 is rotated with a sufficiently high speed, the at least one movable pin 62 is held within said cavity 80 by the effect of the centrifugal force. Below a predetermined threshold speed of rotation of the movable portion 81, the movable pin 62 falls by the effect of gravity and partially leaves the cavity 80.
- the fixed portion 61 comprises at least one ramp 63 consisting of two inclined planes 64 and 65, a first plane 64 of low slope and a second plane 65 of steep slope.
- the second plane 65 is vertical. It further comprises a footprint 66 in which the pin 62 can be inserted when it falls by the effect of gravity, since the speed of rotation is sufficiently low.
- the principle of anti-rollout device is as follows: at the start of the motor pump, the pin 62 partially inserted into the cavity 80 is rotated in the authorized direction, it then climbs the plane 64 of low slope before falling back into the footprint 66 arranged in the plane 65 of steep slope.
- the centrifugal force keeps the pin 62 in position in the cavity 80.
- the pin 62 falls back by the effect of gravity.
- a reversal of the direction of rotation of the shaft 17 causes the pin 62 against the footprint 66 of the plane 65.
- the steep slope of the plane 65 prevents the pin 62 from climbing this plane 65 and thus blocks in rotation the shaft 17 in the unauthorized direction.
- anti-rollover device 60 is configured so that, below the speed threshold:
- the pin 62 is pushed into the cavity 80 by contact with the inclined plane 64 of slight slope, when the movable portion 81 rotates in an authorized direction of rotation,
- the pin portion 62 outside the cavity 80 blocks the rotation by contact with the inclined plane 65 of steep slope, when the movable portion 81 rotates in the opposite direction.
- the movable portion 81 is formed in the flywheel 23.
- One or preferably several cavities 80 are formed in the lower surface of the steering wheel. inertia.
- the cavities have a substantially cylindrical internal shape along an axis parallel to the longitudinal axis of the shaft 17.
- the anti-unwinding device thus comprises as many pins 62 as cavities 80.
- the pins 62 are of substantially cylindrical outer shape along an axis main, and adapted to slide in the cavity 80 along the longitudinal axis by the effect of gravity.
- a recess 66 in the form of an arc is arranged in the vertical plane 65 of shape adapted to the cylindrical pin 62.
- the pins 62 may comprise a duct 70, arranged at the center of the pin and substantially parallel to the main axis of the pin 62.
- the opening duct 70 facilitates the flow of the coolant to inside the cavity 80 during a movement of the pin 62.
- the at least one peg 62 may also comprise at its two longitudinal ends a chamfered profile or a rounded profile 71.
- the chamfered profile, or the rounded profile 71 shown in side view in FIG. 6b, is intended to to break the right angle between the base of the cylinder and a generatrix of the cylinder. This configuration advantageously facilitates the rise of the pin on the plane 64 of lower slope, and to limit the impact between the movable portion and the fixed portion 61 below the predetermined speed threshold.
- an anti-unwinding device comprising a plurality of cavities 80 and pins 62.
- the cavities 80 are then arranged at equal distances from the axis of rotation of the shaft 17 and angularly equidistributed over the circumference of the shaft.
- the moving part 81 For example, the device comprises four cavities 80 comprising four pins 62 arranged in four cardinal points of the flywheel 23.
- anti-rollover device comprising the same number of cavities 80 and ramps 63.
- the ramps 63 can be arranged on the fixed part 61 facing the cavities 80 of the movable part 81, and angularly evenly distributed on the circumference of the fixed part 61.
- four ramps 64 are arranged at four cardinal points on a surface of the thermal barrier 14 opposite the flywheel 23.
- the locking in rotation results from the contact of each of the pieces. 62 with a ramp 65 of the fixed part.
- the torque generated on the shaft is advantageously distributed over each of the pins.
- the anti-unwinding device comprises a different number of cavities 80 and ramps 63.
- the device comprises the four cavities 80 already mentioned and comprises five ramps arranged on the thermal barrier 14.
- the blocking in rotation results from the contact of a single pin 62 with a single ramp 65.
- This configuration has several advantages.
- the increase in the number of ramps 63 makes it possible to reduce the angle of the angular displacement of the shaft before it is locked in rotation.
- the locking in rotation is provided by a single pin 62. During successive stops of the motor pump, a different pin may be biased for rotation locking , to limit the mechanical stresses on the pawns.
- the anti-reversing device according to the invention is immersed, its components are exposed to significant mechanical stresses.
- the device must make it possible to oppose a significant torque in the sense of rotation prohibited, typically of the order of 1000 Nm.
- the components In the acceleration and deceleration phases below the predetermined speed threshold, typically of the order of 180 revolutions per minute, the components must be able to withstand the repeated impact of the pions against the ramps.
- the pins are advantageously made of stainless steel or alternatively of Inconel type alloy. It is also envisaged to mechanically reinforce at least one surface portion of the ramps, pions or cavities by means of a surface hardening process.
- surface hardening is meant a surface treatment or the application of a coating.
- a surface treatment by PVD method for the English acronym of Phase Vapor Deposition, is envisaged.
- anti-unwinding device 60 comprises cavities configured to allow vertical movement of their pin 62. A reduction in the speed of rotation below the predetermined threshold causes the fall of all the pins of the anti-roll device.
- This embodiment is not limiting of the invention. He also for example also considered a horizontally mounted centrifugal motor pump; the axis of rotation of the shaft being horizontal.
- the anti-unwinding device comprises cavities configured to allow radial movement of their peg. The pins are plated in the bottom of the cavity by the effect of the centrifugal force.
- a reduction in the speed of rotation below the predetermined threshold causes the fall of a portion of the pins of the anti-unwinding device; the pins located under the axis of the tree remaining entirely in their cavity. Only the pins located above the axis of rotation participate in the mechanical locking of the rotation. For this configuration, we will favor a large number of cavities, pawns and ramp.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- High Energy & Nuclear Physics (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201430582T SI3058231T1 (en) | 2013-10-17 | 2014-10-17 | Motor-driven centrifugal pump of the primary circuit of small or medium-sized modular nuclear reactors |
CN201480062730.2A CN105814314B (zh) | 2013-10-17 | 2014-10-17 | 用于小型或中型模块化核反应堆的主回路的马达驱动离心泵 |
CA2927808A CA2927808C (fr) | 2013-10-17 | 2014-10-17 | Motopompe centrifuge pour circuit primaire de petits ou moyens reacteurs modulaires nucleaires |
JP2016548426A JP6550064B2 (ja) | 2013-10-17 | 2014-10-17 | 小型または中型モジュラー原子炉の一次回路用のモータ駆動遠心ポンプ |
KR1020167012559A KR102268093B1 (ko) | 2013-10-17 | 2014-10-17 | 소형 또는 중형 크기의 모듈라 원자로의 일차 회로를 위한 모터 구동식 원심 펌프 |
EP14789800.1A EP3058231B1 (fr) | 2013-10-17 | 2014-10-17 | Motopompe centrifuge pour circuit primaire de petits ou moyens réacteurs modulaires nucléaires |
US15/029,591 US10227985B2 (en) | 2013-10-17 | 2014-10-17 | Centrifugal cooling pump for a nuclear reactor having a thermal barrier and a vaned wheel flywheel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1360132 | 2013-10-17 | ||
FR1360132A FR3012183B1 (fr) | 2013-10-17 | 2013-10-17 | Motopompe centrifuge pour circuit primaire de petits ou moyens reacteurs modulaires nucleaires. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015055831A1 true WO2015055831A1 (fr) | 2015-04-23 |
Family
ID=50231281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/072349 WO2015055831A1 (fr) | 2013-10-17 | 2014-10-17 | Motopompe centrifuge pour circuit primaire de petits ou moyens réacteurs modulaires nucléaires |
Country Status (9)
Country | Link |
---|---|
US (1) | US10227985B2 (fr) |
EP (1) | EP3058231B1 (fr) |
JP (1) | JP6550064B2 (fr) |
KR (1) | KR102268093B1 (fr) |
CN (1) | CN105814314B (fr) |
CA (1) | CA2927808C (fr) |
FR (1) | FR3012183B1 (fr) |
SI (1) | SI3058231T1 (fr) |
WO (1) | WO2015055831A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105952684A (zh) * | 2016-06-17 | 2016-09-21 | 四川五洲仁信科技有限公司 | 新能源汽车电子水泵、控制***及方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2615039C1 (ru) * | 2016-01-11 | 2017-04-03 | Акционерное Общество "Центральное Конструкторское Бюро Машиностроения" | Главный циркуляционный насосный агрегат |
CN106930957A (zh) * | 2017-05-09 | 2017-07-07 | 中科瑞华原子能源技术有限公司 | 一种单轴立式液下泵 |
GB201810951D0 (en) * | 2018-07-04 | 2018-08-15 | Rolls Royce Plc | A nuclear power plant |
CN110259691B (zh) * | 2019-07-24 | 2024-03-15 | 上海阿波罗智能装备科技有限公司 | 一种小堆主泵 |
US11798697B2 (en) * | 2020-08-17 | 2023-10-24 | Terrapower, Llc | Passive heat removal system for nuclear reactors |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4084924A (en) * | 1977-02-25 | 1978-04-18 | Alexander Ivanoff | Pump-motor assemblage for circulating a coolant |
DE3836563A1 (de) * | 1987-10-29 | 1989-05-18 | Mitsubishi Electric Corp | Antriebssystem fuer eine kuehlmittelpumpe in einem atomkraftwerk |
US5356273A (en) * | 1993-12-30 | 1994-10-18 | Westinghouse Electric Corporation | Radial bearing assembly for a high inertia flywheel of a canned pump |
WO2009148850A1 (fr) * | 2008-05-30 | 2009-12-10 | Curtiss-Wright, Electro-Mechanical Corporation | Volant de pompe de refroidissement de réacteur |
JP2012147620A (ja) * | 2011-01-14 | 2012-08-02 | Toshiba Corp | 水冷却モータ用フライホイールおよび水冷却モータ用フライホイールシステム |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3716732A (en) * | 1970-09-21 | 1973-02-13 | Gen Electric | Vertical induction motor |
FR2483538B1 (fr) * | 1980-06-02 | 1984-02-03 | Jeumont Schneider | |
JPS57129291A (en) * | 1981-02-02 | 1982-08-11 | Shin Meiwa Ind Co Ltd | Submergible pump |
JPS6059774U (ja) * | 1983-09-29 | 1985-04-25 | 株式会社東芝 | 逆転防止装置 |
JPH0211890A (ja) * | 1988-06-29 | 1990-01-16 | Toshiba Corp | インターナルポンプの逆転防止器 |
US4886430A (en) * | 1988-07-18 | 1989-12-12 | Westinghouse Electric Corp. | Canned pump having a high inertia flywheel |
JP2569137B2 (ja) | 1988-07-29 | 1997-01-08 | 株式会社日立製作所 | インターナルポンプ |
JPH03157512A (ja) * | 1989-11-15 | 1991-07-05 | Hitachi Ltd | テイルテングパツド形ラジアル軸受 |
JPH05273380A (ja) | 1992-03-26 | 1993-10-22 | Toshiba Corp | インターナルポンプ |
JP3028901B2 (ja) * | 1993-07-30 | 2000-04-04 | 株式会社東芝 | インターナルポンプの逆転防止装置 |
US5549459A (en) * | 1993-12-30 | 1996-08-27 | Westinghouse Electric Corporation | Radial bearing assembly for a high intertia flywheel of a canned motor pump |
US5604777A (en) * | 1995-03-13 | 1997-02-18 | Westinghouse Electric Corporation | Nuclear reactor coolant pump |
JP2003130983A (ja) * | 2001-10-29 | 2003-05-08 | Toshiba Corp | インターナルポンプ |
DE102005036347A1 (de) | 2005-07-29 | 2007-02-01 | Ksb Aktiengesellschaft | Elektromotor mit koaxial zugeordneter Pumpe |
JP2012052425A (ja) * | 2010-08-31 | 2012-03-15 | Ebara Corp | フライホイールを備えたシールレスポンプ |
US9394908B2 (en) * | 2011-05-17 | 2016-07-19 | Bwxt Nuclear Energy, Inc. | Pressurized water reactor with upper vessel section providing both pressure and flow control |
CN102410234B (zh) * | 2011-08-24 | 2015-10-14 | 上海交通大学 | 屏蔽式电机转子***水力损耗测试平台及测试方法 |
US9336908B2 (en) * | 2011-10-26 | 2016-05-10 | Bwxt Nuclear Energy, Inc. | Pressurized water reactor with upper vessel section providing both pressure and flow control |
JP2013167230A (ja) * | 2012-02-16 | 2013-08-29 | Toshiba Corp | 原子炉一次冷却材ポンプ |
-
2013
- 2013-10-17 FR FR1360132A patent/FR3012183B1/fr not_active Expired - Fee Related
-
2014
- 2014-10-17 SI SI201430582T patent/SI3058231T1/en unknown
- 2014-10-17 CA CA2927808A patent/CA2927808C/fr active Active
- 2014-10-17 KR KR1020167012559A patent/KR102268093B1/ko active IP Right Grant
- 2014-10-17 WO PCT/EP2014/072349 patent/WO2015055831A1/fr active Application Filing
- 2014-10-17 EP EP14789800.1A patent/EP3058231B1/fr not_active Revoked
- 2014-10-17 CN CN201480062730.2A patent/CN105814314B/zh active Active
- 2014-10-17 JP JP2016548426A patent/JP6550064B2/ja active Active
- 2014-10-17 US US15/029,591 patent/US10227985B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4084924A (en) * | 1977-02-25 | 1978-04-18 | Alexander Ivanoff | Pump-motor assemblage for circulating a coolant |
DE3836563A1 (de) * | 1987-10-29 | 1989-05-18 | Mitsubishi Electric Corp | Antriebssystem fuer eine kuehlmittelpumpe in einem atomkraftwerk |
US5356273A (en) * | 1993-12-30 | 1994-10-18 | Westinghouse Electric Corporation | Radial bearing assembly for a high inertia flywheel of a canned pump |
WO2009148850A1 (fr) * | 2008-05-30 | 2009-12-10 | Curtiss-Wright, Electro-Mechanical Corporation | Volant de pompe de refroidissement de réacteur |
JP2012147620A (ja) * | 2011-01-14 | 2012-08-02 | Toshiba Corp | 水冷却モータ用フライホイールおよび水冷却モータ用フライホイールシステム |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105952684A (zh) * | 2016-06-17 | 2016-09-21 | 四川五洲仁信科技有限公司 | 新能源汽车电子水泵、控制***及方法 |
CN105952684B (zh) * | 2016-06-17 | 2018-08-21 | 四川五洲仁信科技有限公司 | 新能源汽车电子水泵、控制***及方法 |
Also Published As
Publication number | Publication date |
---|---|
CN105814314B (zh) | 2018-11-16 |
JP6550064B2 (ja) | 2019-07-24 |
CA2927808C (fr) | 2021-11-16 |
KR102268093B1 (ko) | 2021-06-21 |
CA2927808A1 (fr) | 2015-04-23 |
EP3058231B1 (fr) | 2017-11-22 |
SI3058231T1 (en) | 2018-04-30 |
CN105814314A (zh) | 2016-07-27 |
FR3012183B1 (fr) | 2018-03-02 |
JP2017500583A (ja) | 2017-01-05 |
EP3058231A1 (fr) | 2016-08-24 |
US20160273540A1 (en) | 2016-09-22 |
FR3012183A1 (fr) | 2015-04-24 |
US10227985B2 (en) | 2019-03-12 |
KR20160077093A (ko) | 2016-07-01 |
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